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Recommended Stem and Float Sizes

All Bob® standard assemblies are shipped with the minimum recommended Stem and Float sizes for reliable and accurate liquid level control. For special assemblies, list parts separately, i.e. valve, stem, and float ball. For polypropylene float add suffix "P" to the assembly number.
Bob® R400, R900 Series Valves

 Valve Size

Float  / Material / Diameter

Stem / Material
3/8" R440-5 / Copper / 5" Dia. 1/4"-20 x 10" / Brass
1/2" R440-5 / Copper / 5" Dia. 1/4"-20 x 10" / Brass
3/4" R440-5 / Copper / 5" Dia. 1/4"-20 x 10" / Brass
1" R440-6 / Copper / 6" Dia. 1/4"-20 x 10" / Brass

Bob® R600 Series Valves

Valve Size

Float  / Material / Diameter

Stem / Material
All R440-6 / Copper / 6" Dia. 1/4"-20 x 10" / Brass

Bob® RF605T "High Turbo" Series Valves

Valve Size

Float  / Material / Diameter

Stem / Material
1/2" R440-5 / Copper / 5" Dia. 1/4"-20 x 10" / Brass
3/4" R440-5 / Copper / 5" Dia. 1/4"-20 x 10" / Brass
1" R440-8 / Copper / 8" Dia. 3/8"-16 x 12" / Brass
R434-11 Adaptor Required

Bob® R605T "High Turbo" Series Valves

Valve Size

Float  / Material / Diameter

Stem / Material
1-1/4" R440-8 / Copper / 8" Dia. 3/8"-16 x 12" / Brass
R434-11 Adaptor Required
1-1/2" R440-8 / Copper / 8" Dia. 3/8"-16 x 12" / Brass
R434-11 Adaptor Required
2" R440-8 / Copper / 8" Dia. 3/8"-16 x 12" / Brass
R434-11 Adaptor Required

Bob® R610 Series Valves

Valve Size

Float  / Material / Diameter

Stem / Material
1-1/4" R440-8 / Copper / 8" Dia. 1/8" MIP x 12" / Brass
R209 3/8" x 1/8" Adaptor Required
1-1/2" R440-8 / Copper / 8" Dia. 1/8" MIP x 12" / Brass
R209 3/8" x 1/8" Adaptor Required
2" R440-8 / Copper / 8" Dia. 1/8" MIP x 12" / Brass
R209 3/8" x 1/8" Adaptor Required

Bob® RF610 Series Valves

Valve Size

Float  / Material / Diameter

Stem / Material
1-1/4" R440-8 / Copper / 8" Dia. 3/8"-16 x 12" / Brass
R434-11 Adaptor Required
1-1/2" R440-8 / Copper / 8" Dia. 3/8"-16 x 12" / Brass
R434-11 Adaptor Required
2" R440-8 / Copper / 8" Dia. 3/8"-16 x 12" / Brass
R434-11 Adaptor Required

Bob® R700 Series Valves

Valve Size

Float  / Material / Diameter

Stem / Material
3/8" R440-5 / Copper / 5" Dia. 1/4"-20 x 10" / Brass
1/2" R440-5 / Copper / 5" Dia. 1/4"-20 x 10" / Brass
3/4" R440-5 / Copper / 5" Dia. 1/4"-20 x 10" / Brass

Bob® RC810, *R810 Series Valves

Valve Size

Float  / Material / Diameter

Stem / Material
3/8" R440-5 / Copper / 5" Dia. 1/4"-20 x 10" / Brass
1/2" R440-5 / Copper / 5" Dia. 1/4"-20 x 10" / Brass
3/4" R440-5 / Copper / 5" Dia. 1/4"-20 x 10" / Brass
*1" R440-6 / Copper / 6" Dia. 1/4"-20 x 10" / Brass

Bob® R1350, R1360 Series Valves (All)

Valve Size

Float  / Material / Diameter

Stem / Material
All R1340-5 / 316 Stainless Steel / 5" Dia. 1/4"-20 x 10" / 316 Stainless Steel

Bob® R1370 Series Valve (All)

Valve Size

Float  / Material / Diameter

Stem / Material
All R1340-7 / 316 Stainless Steel / 7" Dia. 3/8"-16 x 10" / 316 Stainless Steel
106272-2 Adaptor Required

Bob® R1380 Series Valve (All)

Valve Size

Float  / Material / Diameter

Stem / Material
All R1340-8 / 316 Stainless Steel / 8" Dia. 3/8"-16 x 12" / 316 Stainless Steel
106272-2 Adaptor Required
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